With temperature switch Cover for protection against high surface temperatures

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María del Carmen Martin Herrero
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1 Descripción The BW 156 braking is designed for drives with frequency converters of small to medium output. Installation in and outside the control cabinet is possible. In addition to the high protection class IP66, the profile resistors REOHM 156 are also ULcertified and have a power of 50 W up to W (as combination). Optional Punto de venta único compact construction easy installation short-circuit proof suitable for the use with any frequency drive use even in rough conditions standing or lying assembly highly resistive on overload With temperature switch Cover for protection against high surface temperatures Ficha técnica Valores de resistencia : 0, Ohm Potencia constante : W max. operating voltage : 900 V Circuit example

2 Technical data Resistance values R [Ohm] Continous power at 25 C P [W] Max. operating voltage U [V DC] / [V AC] BW 156/400 0, / 600 BW 156/600 0, / 600 BW 156/ / 600 BW 156/ / 600 BW 156/ / 600 BW 156/ / 600 BW 156/2000 0, / 600 BW 156/2400 0, / 600 BW 156/3000 0, / 600 BW 156/4500 0, / 600 BW 156/6000 0, / 600 BW 156/7500 0, / 600 Higher power ratings on request Note The ratings apply for 100 % duty cycle and free access and exit of cooling air. In general: Is the ambient temperature higher than 40 C, the continuous power must be reduced by 5 % per 10 K temperature rise.

3 Dimension drawings - Single resistor up to 1500 W Dimensions L1 L2 L3 L4 H D Connection cable BW 156/ ,5 BW 156/ ,5 BW 156/ ,5 BW 156/ ,5 IP20/40 PTFE AWG14 BW 156/ ,5 BW 156/ ,5 L1 L2 L3 L4 H D Connection line BW 156/ ,5 BW 156/ ,5 BW 156/ ,5 BW 156/ ,5 BW 156/ ,5 IP54/65 shielded connection cable 3x1,5 mm² BW 156/ ,5 Other fixing dimensions possible

Design with different protection ratings IP20 / IP40 IP20 / IP40 with temperature switch IP54 / IP65 IP54 / IP65 or higher with temperature switch Protection ratings Depending on the design and

For a higher degree of protection (> IP40) a maximum temperature increase of 200K is allowed. Attention! Duration overtemperature values of> 200 K could result to an impairment of protection rating.

4 Design with different protection ratings IP20 / IP40 IP20 / IP40 with temperature switch IP54 / IP65 IP54 / IP65 or higher with temperature switch Protection ratings Depending on the design and execution various types of protection ratings can be realized up to IP66. At protection ratings less than / equal IP40 the temperature increase must be at the surface resistance max. 300K. For a higher degree of protection (> IP40) a maximum temperature increase of 200K is allowed. Attention! Duration overtemperature values of> 200 K could result to an impairment of protection rating. Overvoltage protection It is possible to control the temperature of the resistance by using a temperature switch. In case of exceeding a rated temperature the temperature switch opens and can, for example, trigger an existing signaling contact. The temperature switch is mounted externally in protection class IP20 / IP40 and provided with two connection strands. At IP54 / IP65 or higher, the temperature switch is integrated in the resistance and provided the connection with a temperature resistant cable.

5 Dimension drawings - Resistor combination up to 7500 W B3 B4

6 Dimensions - Resistor combination up to 7500 W L1 L2 H1 H2 D design Connection cable BW 156/ ,5 BF 1 BW 156/ ,5 BF 1 BW 156/ ,5 BF 1 BW 156/ ,5 BF 2 IP20/40 PTFE AWG14 BW 156/ ,5 BF 3 BW 156/ ,5 BF 4 L1 L2 H1 H2 D design Connection cable BW 156/ ,5 BF 1 BW 156/ ,5 BF 1 BW 156/ ,5 BF 1 BW 156/ ,5 BF 2 BW 156/ ,5 BF 3 IP54 shielded connection cable 3x1,5 mm² BW 156/ ,5 BF 4 Other fixing dimensions possible.

7 Surface temperature as a function of load Surface temperature BW 156 / 400 Surface temperature BW 156 / 600 Surface temperature BW 156 / 800 Surface temperature BW 156 / 100 Surface temperature BW 156 / 1200 Surface temperature BW 156 / 1500 Surface temperature increase, even over temperature, describes the increase in surface temperature when loaded.

8 Load diagram These performances are valid for continuous operation. The power values may be increased in the short-term operation as a function of the duty cycle multiplied by the appropriate factor in the following diagram, or by the following formula.

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